I made a canopy that is very similar and I dont mind giving my 2 cents.
Its not the best picture of it, but its the only one I have right now...
Do you have to lift the lid on the canopy to access the tank? (feeding, cleaning, ectâ€¦)
The way I did mine I do have to lift it to access the tank. But unless you have a completely uncovered tank you always have to lift something. I think this is a pretty common design, but it is different than the ones where the front half of the canopy opens up. I decided against that for two reasons. First, if you go that route, then you need to make the canopy pretty tall to be able to access your tank easily. And I dont like the look of a really tall canopyl. I actually wish I had made mine even shorter like the OP. Second, its easier to make it fit together if, like me, you are not that good at making a stand - this design is a lot more forgiving.
Did you leave the back of the canopy open for equipment?
I did not leave it open. What I did instead was to drill several 2" holes in the in the back (3 on each side and 2 in the middle). I wanted to have enough openings for air flow and cords, but I didnt want to leave it completely open for two reasons. First, I wanted to contain as much sounds as possible - I hate noise. Second, and more importantly, I didn't want light shining out of the canopy all over the wall behind the tank, so I tried to keep it as contained as possible - and I seem to have avoided the light problem (the noise problem is a whole different story).
Have you noticed any condensation build-up under the canopy?
Haha, this is an important question. There will be moisture under in the canopy no matter what - but as for condensation that can be controlled. At first I just painted the inside of the tank with a white mildrew resistant paint. However, I think I used a different product than I originally intended, because it did not seal the wood. So a day after putting the canopy on the tank, the top pieces warped up by about 2" on the ends. So I had to take it off, let it dry, and then seal it with some polyurethane. So you definitely need to assume their will be moisture. However, actual condensation can be reduced or even avoided if you put glass/plastic covers over the openings of the tank. I have an acrylic tank, so I have those stupid little openings. Once I put plastic covers over the openings the condensation went away. But when you open the canopy you can tell its very humid in there, so even with the covers I wouldn't rule out the possibility of condensation.